The objective of this research is to determine the effects of changing disinfectants (from free chlorine to chloramines and vice versa) on rates and concentrations of metals leaching from lead, brass, and copper distribution system components. Within the next five years, more than 100 sizeable utilities will undergo disinfection conversion to chloramines. Part 1 (Literature Review) was published within a few months of the start of the project in order to provide timely information to utilities concerning the effects of changing disinfectants and compliance with the Lead and Copper Rule. Part 2 (Laboratory Studies, Pipe Loop Testing, and Field Sampling) should be available by early 2009, after completion of the laboratory and field sampling that will be conducted through May of 2008.